{"title":"Bison 4 \u0026 6 Jaw Scroll Chucks","description":"\u003cp\u003eBison self-centring scroll chucks with 4 jaws, for square and octagonal stock, and 6 jaws, for thin-walled tubes and rings that a 3 jaw chuck would distort. Cast iron and steel bodies.\u003c\/p\u003e\u003cp\u003eAll held in UK stock. Order before 4.30pm for same-day dispatch, or call our technical team on 01732 887334 for help choosing.\u003c\/p\u003e","products":[{"product_id":"3604-125","title":"Bison Cast Iron Scroll Chuck - 4 Jaw - 1 Piece Jaw (Rear Mount) - 125mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3604 series rear-mount 4‑jaw cast iron scroll chuck in 125mm diameter is a robust, high‑accuracy holding solution for lathes. Its independent four‑jaw design lets you center round or irregular parts quickly and precisely, making setup faster and more reliable. With ground working surfaces, this chuck delivers consistent grip and smooth operation in everyday workshop use.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eTrue roundness with 4‑jaw centering\u003c\/b\u003e: Each jaw can be adjusted independently to precisely locate and hold your workpiece, reducing runout and speeding up repeatable setups for complex shapes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGround working surfaces for durability\u003c\/b\u003e: Precision-ground contact surfaces ensure stable gripping over many cycles, helping maintain accuracy and extending tool life even under demanding use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComplete jaw set and wrench included\u003c\/b\u003e: Comes with reversible hard jaws for internal gripping and outside hard jaws for external gripping, plus a wrench so you can start production right away.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nBuilt in Poland at the Bison Bial factory, these chucks are recognized for dependable quality and long tool life. This rear‑mount 125mm chuck is a versatile, reliable choice for fabricators, engineers, and hobbyists who need consistent, repeatable performance from a single, durable holding solution.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282878836814,"sku":"3604-125","price":669.92,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3604_70d767f7-307e-448a-8794-28dc1b17a4d0.png?v=1694801080"},{"product_id":"3604-160","title":"Bison Cast Iron Scroll Chuck - 4 Jaw - 1 Piece Jaw (Rear Mount) - 160mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3604 series rear-mount, 4‑jaw cast iron scroll chuck is built for turning and precision machining. It features ground working surfaces for true concentricity and a sturdy rear-mount design that delivers a secure, repeatable grip on a wide range of workpieces. This chuck is ideal for engineers, machinists, tradespeople, hobbyists, and anyone who needs dependable, accurate workholding.\n\u003cbr\u003e\u003cbr\u003e\nSupplied with a wrench and a complete 1‑piece jaw set (reversible hard jaws and outside hard jaws) ready to use straight from the box.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eRear‑Mount Construction for Secure, Repeatable Holding\u003c\/b\u003e: The rear‑mount design provides rigid alignment with your spindle, reducing runout and delivering consistent grip for repeatable machining results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGround Working Surfaces for Precision and Longevity\u003c\/b\u003e: Ground surfaces ensure true trueness and long service life, resisting wear under demanding turning operations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIncludes 1‑Piece Jaw Set\u003c\/b\u003e: Comes with reversible hard jaws and outside hard jaws to handle a range of workpieces, plus a wrench for quick setup and fast changes between jobs.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nDesigned for a 160mm chuck size, this cast iron scroll chuck delivers durable performance across a wide variety of turning tasks. All Bison scroll chucks are 100% made in the Bison Bial factory in Poland and are renowned for exceptional quality and tool life, giving you confidence to tackle demanding projects with consistent results.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282878869582,"sku":"3604-160","price":736.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3604_3a75f9f0-faa0-45ac-bc19-da5bd2ce57fc.png?v=1694801084"},{"product_id":"3604-200","title":"Bison Cast Iron Scroll Chuck - 4 Jaw - 1 Piece Jaw (Rear Mount) - 200mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3604 rear-mount, 4‑jaw cast iron scroll chuck is a dependable workholding solution for mid‑sized lathes. With a 200 mm diameter and ground working surfaces, it delivers true grip and repeatable accuracy on a variety of parts. It ships with a wrench and a complete jaw set—reversible hard jaws plus outside hard jaws—so you’re ready to tackle different workpieces from the box. All Bison scroll chucks are 100% manufactured in the Bison Bial factory in Poland, renowned for long tool life and consistent performance.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eGround, precision-ready working surfaces\u003c\/b\u003e: Ensures accurate grip and minimal runout, providing repeatable results across multiple parts and long-term wear resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e4‑jaw scroll design for quick, true centering\u003c\/b\u003e: Lets you quickly center irregular or symmetrical parts with reliable gripping force, reducing setup time and rework.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComplete jaw set and wrench included\u003c\/b\u003e: Versatile holding options out of the box with reversible and outside jaws, plus a dedicated wrench for fast, tool‑free adjustments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis chuck is built to enhance reliability and workflow on demanding turning applications. The combination of a robust cast iron body, precision ground faces, and a flexible jaw system delivers secure hold, consistent performance, and the confidence to take on a wide range of parts with fewer interruptions.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282878935118,"sku":"3604-200","price":857.54,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3604_8d631c44-25bb-4d3c-b981-970edc948cdc.png?v=1694801088"},{"product_id":"3604-250","title":"Bison Cast Iron Scroll Chuck - 4 Jaw - 1 Piece Jaw (Rear Mount) - 250mm","description":"\u003cdiv\u003e\n\u003cp\u003eThe Bison 3604 series rear mount four-jaw cast iron scroll chuck is built for reliable, repeatable gripping on round workpieces. With precision-ground working surfaces and a sturdy cast iron body, it delivers true, consistent clamping across a range of turning tasks. Supplied with a wrench and 1 piece jaws: 1 set of reversible hard jaws and 1 set of outside hard jaws, this chuck is ready to tackle everyday machining needs. All Bison scroll chucks are 100% manufactured in the Bison Bial factory in Poland and are renowned for offering exceptional quality and tool life.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eGround working surfaces\u003c\/b\u003e: Precision-ground contact areas improve grip accuracy and repeatable performance, helping you achieve cleaner finishes and tighter tolerances with every pass.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIncluded jaw kit with wrench\u003c\/b\u003e: Comes with 1 piece jaws, including reversible hard jaws and outside hard jaws, plus a wrench—providing flexible holding options out of the box and reducing setup time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e250 mm rear-mount cast iron design\u003c\/b\u003e: Large working capacity with a robust rear-mount interface for stable, reliable clamping on bigger parts, backed by Polish manufacturing for consistent quality and long tool life.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThis combination of durable construction, versatile jaw options, and generous capacity makes the Bison 3604 chuck a dependable choice for professionals and hobbyists alike, helping you complete projects faster with repeatable, high-quality results.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282878967886,"sku":"3604-250","price":1143.74,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3604_0481a16c-3ca2-40e4-9c7a-d8938a6d539d.png?v=1694801092"},{"product_id":"3604-315","title":"Bison Cast Iron Scroll Chuck - 4 Jaw - 1 Piece Jaw (Rear Mount) - 315mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3604 series rear-mount 4‑jaw cast iron scroll chuck is a robust workholding solution for lathes, sized at 315mm to handle a wide range of stock with confidence. It’s ideal for engineers, machinists, tradespeople, hobbyists, and busy workshops that demand secure, precise gripping and repeatable results in turning and facing operations.\n\u003c\/p\u003e \u003cp\u003e\nBuilt with ground working surfaces, this chuck provides true running and consistent clamping across setups. It’s supplied with a wrench and a complete jaw kit: 1-piece jaws plus a set of reversible hard jaws and a set of outside hard jaws, giving you flexible gripping options for different workpieces. All Bison scroll chucks are 100% made in the Bison Bial factory in Poland, renowned for exceptional quality and long tool life.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eGround precision surfaces for repeatable accuracy\u003c\/b\u003e: Ensures true running and consistent grip across multiple setups, reducing runout and delivering reliable part finishes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComplete jaw system for versatility\u003c\/b\u003e: Includes 1-piece jaws with reversible hard jaws and outside hard jaws, plus a wrench—ready to tackle a wide range of stock and grips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRear-mount cast iron construction for durability\u003c\/b\u003e: Delivers stiff, stable clamping and long service life, supporting consistent performance in demanding turning jobs.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis chuck simplifies setup, enhances holding power, and supports high-quality results across a variety of turning tasks. Its rigid rear-mount design and high-quality Polish manufacturing give you the confidence to work quickly and accurately, even with challenging or irregular workpieces.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879000654,"sku":"3604-315","price":1719.32,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3604_80211b51-27db-4d5a-bac6-94dea84820e0.png?v=1694801095"},{"product_id":"3604-400","title":"Bison Cast Iron Scroll Chuck - 4 Jaw - 1 Piece Jaw (Rear Mount) - 400mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison Cast Iron Scroll Chuck – 4 Jaw, Rear Mount (1 Piece Jaw) in a 400mm size is a rugged, dependable gripping solution designed for lathe operators, engineers, tradespeople, and hobbyists who demand consistent, repeatable clamping. Built for durability and long tool life, this chuck is ideal for holding round and irregular workpieces with confidence during precision machining.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eRear-mount 4‑jaw design with 400mm capacity\u003c\/b\u003e: Provides secure, concentric gripping while mounting cleanly to compatible lathes, enabling fast setup and reliable performance across a wide range of part sizes and shapes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGround working surfaces for precision\u003c\/b\u003e: Precision-ground surfaces reduce runout and wear, promoting accurate holding and longer life under demanding machining conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComplete jaw kit with versatile clamping\u003c\/b\u003e: Includes 1 piece jaws plus both reversible hard jaws and outside hard jaws, giving you flexible gripping options and quick jaw changes for different parts without downtime.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis chuck is 100% made in the Bison Bial factory in Poland, renowned for strict quality control and exceptional tool life. With its combination of robust cast iron construction, precise grinding, and a versatile jaw set, it helps you achieve repeatable, high-quality results while keeping workflow efficient and downtime to a minimum.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879033422,"sku":"3604-400","price":3670.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3604_b9056141-fdbe-4353-a91b-de14e4f93622.png?v=1694801099"},{"product_id":"3604-500","title":"Bison Cast Iron Scroll Chuck - 4 Jaw - 1 Piece Jaw (Rear Mount) - 500mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3604 series rear mount, 4 jaw cast iron scroll chuck is built for durability and dependable workholding across a wide range of turning tasks. With ground working surfaces, it delivers true grip and repeatable results for consistent parts production.\n\u003cbr\u003eSupplied with a wrench and 1 piece jaws: 1 set of reversable hard jaws and 1 set of outside hard jaws. All Bison scroll chucks are 100% made in the Bison Bial factory in Poland and are renowned for offering exceptional quality and tool life.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIncludes reversible hard jaws and outside hard jaws\u003c\/b\u003e: A complete jaw kit plus a wrench lets you quickly switch between gripping styles, enabling rapid setup and versatile holding for different workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGround working surfaces for precise grip\u003c\/b\u003e: Ground surfaces ensure consistent clamping accuracy and repeatable results over many cycles, reducing runout and part variance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRear-mount cast iron construction from Poland\u003c\/b\u003e: Rugged, reliable housing designed for long tool life; manufactured in the Bison Bial factory in Poland for proven quality and durability.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nDesigned to deliver steady, repeatable holding for a variety of turning tasks, this chuck combines a robust rear-mount design with a durable cast iron body and precisely finished surfaces. The included jaw kit and wrench enable fast setup and flexible gripping, helping you move from job to job with confidence. Made in Poland to exacting standards, it offers long service life and reliable performance for busy workshops.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879066190,"sku":"3604-500","price":6416.18,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3604_516cc2f6-7d67-49d2-83cc-3b55f93f61c2.png?v=1694801102"},{"product_id":"3704-125","title":"Bison Steel Scroll Chuck - 4 Jaw - 1 Piece Jaw (Rear Mount) - 125mm","description":"\u003cdiv\u003e\n\u003cp\u003eThe Bison 3704 series rear-mount 4 jaw steel scroll chuck, 125mm, is a precision workholding solution designed for turning and machining. It features a balanced scroll plate and hardened and ground working surfaces to deliver consistent grip and long life. Supplied with a wrench and 1 piece jaws: 1 set of reversible hard jaws and 1 set of outside hard jaws. All Bison scroll chucks are 100% made in the Bison Bial factory in Poland and are renowned for exceptional quality and tool life.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eBalanced scroll plate for precise gripping\u003c\/b\u003e: A carefully balanced scroll plate minimizes runout and vibration, helping you hold workpieces securely with consistent accuracy and a clean finish.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHardened and ground working surfaces for durability\u003c\/b\u003e: The hardened and ground surfaces resist wear, extending tool life and preserving grip reliability through repeated use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReady-to-use with included tools and jaws\u003c\/b\u003e: Comes with a wrench and 1-piece jaws (reversible hard jaws and outside hard jaws), so you can install and start turning with minimal downtime.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eManufactured 100% in Poland at the Bison Bial factory, this chuck delivers dependable performance for everyday turning tasks, helping you achieve repeatable results and a smooth, efficient workflow with confidence in every part.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879098958,"sku":"3704-125","price":997.46,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3704_eb58ea51-e77d-487c-b1b5-456c8456e548.png?v=1694801107"},{"product_id":"3704-160","title":"Bison Steel Scroll Chuck - 4 Jaw - 1 Piece Jaw (Rear Mount) - 160mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3704 series rear-mount, 4-jaw steel scroll chuck is built for precision turning on a wide range of workpieces. Designed for engineers, machinists, DIY enthusiasts, and hobbyists, it delivers secure, repeatable grip and straightforward setup for everyday machining tasks.\n\u003cbr\u003e\u003cbr\u003e\nThis 160mm chuck features a balanced scroll plate and hardened, ground working surfaces for durable, long-lasting performance. It ships with a wrench and a complete jaw kit: one-piece jaws, plus a set of reversible hard jaws and a set of outside hard jaws, providing flexible clamping options from delicate to heavy-duty parts. All Bison scroll chucks are 100% made in the Bison Bial factory in Poland.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eBalanced scroll plate for precision\u003c\/b\u003e: Ensures smooth operation, minimizes runout, and improves concentricity for repeatable turning results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComplete jaw kit for versatility\u003c\/b\u003e: Includes 1-piece jaws plus reversible hard jaws and outside hard jaws, enabling quick changes for a wide range of parts without extra purchases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRugged, long-lasting construction\u003c\/b\u003e: Hardened and ground working surfaces with rear-mount design deliver durable grip and reliable performance under demanding use.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nWith this chuck, you gain faster setup times, dependable part holding, and repeatable accuracy across batches. The included jaw kit lets you switch gripping styles on the fly, while the durable construction and precision-ground surfaces minimise maintenance and downtime, helping you finish projects with cleaner finishes and less rework.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879131726,"sku":"3704-160","price":1114.06,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3704_9b4d4146-ee59-49db-8e87-f30da5a9e728.png?v=1694801111"},{"product_id":"3704-200","title":"Bison Steel Scroll Chuck - 4 Jaw - 1 Piece Jaw (Rear Mount) - 200mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3704 series rear-mount, 4-jaw steel scroll chuck is a robust workholding solution for turning applications. With a 200 mm diameter and a balanced scroll plate, it delivers secure, repeatable gripping on large parts while maintaining smooth operation thanks to hardened and ground working surfaces.\n\u003c\/p\u003e \u003cp\u003e\nSupplied with a wrench and a complete jaw kit (reversible hard jaws and outside hard jaws), it’s ready to use straight out of the box. Built 100% in the Bison Bial factory in Poland, this chuck is renowned for exceptional quality and long tool life.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eBalanced scroll plate for smooth, accurate grip\u003c\/b\u003e: The balanced scroll mechanism minimizes runout and vibration, helping you achieve repeatable gripping and cleaner finishes on a wide range of parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComplete jaw kit included\u003c\/b\u003e: Includes reversible hard jaws and outside hard jaws, enabling quick changeovers and versatile gripping without needing additional purchases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRear-mount design with hardened, ground surfaces\u003c\/b\u003e: Secure mounting combined with wear-resistant, precision-ground surfaces delivers long service life and consistent clamping performance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis combination of precision, durability, and ready-to-use versatility translates into real-world gains: fewer reworks, faster setups, and dependable results across diverse turning projects. Trust in a product built for professionals, with manufacturing quality that supports daily production and demanding workloads.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879164494,"sku":"3704-200","price":1422.52,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3704_35e94dcf-257c-44d5-a9cf-442b85d9f2e1.png?v=1694801115"},{"product_id":"3704-250","title":"Bison Steel Scroll Chuck - 4 Jaw - 1 Piece Jaw (Rear Mount) - 250mm","description":"\u003cdiv\u003e\n\u003cp\u003eThe Bison 3704 series rear-mount, 4-jaw steel scroll chuck offers reliable, precise gripping for turning applications with a 250mm diameter. It’s designed for a wide range of parts, helping you achieve concentric clamping and repeatable results with confidence.\u003c\/p\u003e \u003cp\u003eManufactured 100% in the Bison Bial factory in Poland, this chuck features a balanced scroll plate and hardened, ground working surfaces for long tool life and consistent performance. It ships with a wrench and 1 piece jaws: 1 set of reversible hard jaws and 1 set of outside hard jaws.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eBalanced scroll plate\u003c\/b\u003e: Provides smooth, even clamping and helps maintain accurate runout for repeatable parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHardened and ground working surfaces\u003c\/b\u003e: Withstands daily use, delivering long tool life and consistent gripping accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIncludes wrench and jaw kit\u003c\/b\u003e: Comes with a wrench and a complete set of jaws—reversible hard jaws and outside hard jaws—for fast setup and flexible workholding.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith the Bison 3704 rear-mount chuck, you gain dependable grip, repeatable precision, and a durable tool designed to survive demanding workshop use. Built to exacting standards in Poland, it offers enduring performance that helps you complete jobs on time with confidence.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879197262,"sku":"3704-250","price":1690.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3704_dae527a2-31f5-476f-83e1-1a0521921bb6.png?v=1694801119"},{"product_id":"3704-315","title":"Bison Steel Scroll Chuck - 4 Jaw - 1 Piece Jaw (Rear Mount) - 315mm","description":"\u003cdiv\u003e\n\u003cp\u003eThe Bison 3704 series rear-mount, 4 jaw steel scroll chuck is designed for reliable, high-precision workholding on lathes. Sized at 315 mm in diameter, it’s ideal for machinists, engineers, and hobbyists who need fast, secure gripping of round and irregular workpieces, with quick, true centering on every part.\u003c\/p\u003e \u003cp\u003eWith a balanced scroll plate and hardened, ground working surfaces, this chuck delivers long service life and consistent accuracy. It ships with a wrench and a complete jaw set: reversible hard jaws for versatile gripping and outside hard jaws for straightforward, square holding. All Bison scroll chucks are 100% made in the Bison Bial factory in Poland, a name trusted for quality and durability.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eBalanced scroll plate for smooth, accurate running\u003c\/b\u003e: minimizes runout and enables rapid, repeatable centering on each part.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHardened and ground surfaces for long life\u003c\/b\u003e: resist wear and maintain gripping accuracy through many machining cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReady-to-use with versatile jaws and wrench\u003c\/b\u003e: includes reversible and outside hard jaws plus a wrench for quick setup and flexible workholding of a variety of part shapes.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eBy delivering secure, true grip with minimal runout, this chuck speeds setup and reduces rework. The durable construction and precision-ground surfaces stay reliable under demanding turning tasks, helping you achieve consistent finishes and accurate dimensions. With OEM-quality manufacture in Poland, you gain a dependable, long-lasting solution that supports both prototyping and production workloads.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879230030,"sku":"3704-315","price":2556.72,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3704_5d2a6e50-a911-40f1-bbcc-755702b3b669.png?v=1694801123"},{"product_id":"3704-400","title":"Bison Steel Scroll Chuck - 4 Jaw - 1 Piece Jaw (Rear Mount) - 400mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3704 series rear mount, 4 jaw steel scroll chuck (400mm) is built for demanding machining tasks where precise, repeatable gripping matters. It features a balanced scroll plate and hardened, ground working surfaces to deliver reliable clamping and long tool life. All Bison scroll chucks are 100% made in the Bison Bial factory in Poland, a testament to quality and durability you can trust in daily use.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eBalanced scroll plate for consistent gripping\u003c\/b\u003e: Provides even clamping force across all jaws, reducing runout and delivering repeatable, accurate results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHardened and ground working surfaces\u003c\/b\u003e: maximizes wear resistance and precision over countless cycles, helping maintain accuracy over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComplete with wrench and 1-piece jaws\u003c\/b\u003e: Includes 1 set of reversible hard jaws and 1 set of outside hard jaws, so you’re ready to tackle a range of workpieces right away.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis chuck delivers reliable, repeatable holding that speeds setup and minimizes downtime. Its robust construction and precision-ground surfaces translate to cleaner finishes and fewer part slippages, while the Polish manufacturing heritage provides confidence in long-term performance for workshops, job shops, and training environments alike.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879262798,"sku":"3704-400","price":5460.06,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3704_9aff7a0c-d589-4eab-aa31-9d98c062064b.png?v=1694801126"},{"product_id":"3704-500","title":"Bison Steel Scroll Chuck - 4 Jaw - 1 Piece Jaw (Rear Mount) - 500mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3704 series rear‑mount 4‑jaw steel scroll chuck is engineered for precision turning and reliable, repeatable gripping. Designed for machinists, engineers, tradespeople, and serious hobbyists, it helps you hold round stock and irregular parts with confidence.\n\u003c\/p\u003e\n\u003cp\u003e\nFeaturing a balanced scroll plate and hardened, ground working surfaces, it delivers long tool life and consistent results. It ships with a wrench and a complete jaw setup (1 piece jaws with reversible hard jaws and outside hard jaws), and every chuck is 100% made in the Bison Bial factory in Poland, ensuring tight tolerances and durable performance.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eRear‑mount 4‑jaw design for true, repeatable gripping\u003c\/b\u003e: Securely holds parts with high concentricity and fast setup, ideal for precise turning and consistent results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBalanced scroll plate with hardened and ground surfaces\u003c\/b\u003e: Reduces runout, improves durability, and extends tool life for demanding machining tasks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIncludes wrench and complete jaw set (reversible and outside hard jaws)\u003c\/b\u003e: Quick, versatile clamping options right out of the box for a wide range of parts and applications.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nWith this chuck, you can streamline setups, reduce downtime, and improve finish quality across a range of turning operations. The robust construction and included jaw versatility let you switch between parts quickly, maintain concentricity, and rely on stable clamping under demanding workloads.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879328334,"sku":"3704-500","price":12126.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3704_706f4464-d59a-4a7c-91fc-9e80017fa0cd.png?v=1694801130"},{"product_id":"3804-200","title":"Bison Cast Iron Scroll Chuck -  6 Jaw - 1 Piece Jaw (Rear Mount) - 200mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison Cast Iron Scroll Chuck is a rear-mount, 6-jaw chuck designed for dependable, uniform gripping on a wide range of rounds and irregular parts. Built from cast iron with ground working surfaces, it helps prevent damage and deflection while delivering consistent clamping across the entire workpiece. Ideal for lathes and turning applications, it supports precise, repeatable results with every cycle.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eSix-Jaw, Rear-Mount Design\u003c\/b\u003e: Provides even gripping around the workpiece, minimizing distortion and ensuring stable, reliable performance during machining.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGround Surfaces \u0026amp; Cast Iron Body\u003c\/b\u003e: Ground working surfaces boost accuracy and repeatability, while the rigid cast iron construction delivers durability and long tool life in demanding shop environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReady-to-Use Kit with Wrench and Jaw Sets\u003c\/b\u003e: Includes 1 piece of reversible hard jaws and 1 set of outside hard jaws plus a wrench, enabling quick setup and versatile clamping for varying part shapes without downtime.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nProduced 100% at the Bison Bial factory in Poland, this scroll chuck combines trusted manufacturing quality with practical, user-focused design. The 200mm size offers a balanced clamping range for a variety of parts, while the included jaw configurations let you switch between gripping approaches as workpieces demand. With ground accuracy, durable construction, and a complete, ready-to-use jaw kit, you can count on consistent performance, minimized setup time, and dependable results across multiple jobs.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879361102,"sku":"3804-200","price":1990.68,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3804_fdc9ee25-4023-482a-99a7-2681392f367c.png?v=1694801135"},{"product_id":"3804-250","title":"Bison Cast Iron Scroll Chuck -  6 Jaw - 1 Piece Jaw (Rear Mount) - 250mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3804 series rear-mount, 6-jaw cast-iron scroll chuck is designed for precise, repeatable gripping on lathes and turning centers. Sized at 250mm, it accommodates a wide range of workpieces while its ground working surfaces help prevent damage and deflection, delivering a uniform grip from part to part. This chuck is an ideal choice for professionals who demand dependable performance without compromising on finish or control.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eGround finished working surfaces\u003c\/b\u003e: Provide stable, accurately machined contact across all jaws for a consistent, concentric grip and reduced risk of surface damage during clamping.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComplete jaw kit for versatile holding\u003c\/b\u003e: Includes reversible hard jaws and outside hard jaws so you can quickly switch between internal and external gripping, cutting setup time and downtime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurable rear-mount six-jaw cast iron construction (with wrench)\u003c\/b\u003e: Built for rugged use and long tool life; the rear-mount design offers reliable rigidity on demanding cuts, and the included wrench supports immediate use straight out of the box.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nIn daily use, this chuck helps you clamp securely, improve hold consistency, and speed up changeovers, delivering reliable results across a variety of turning applications. Its robust build, Polish manufacturing heritage, and included accessories give you confidence that your workpieces stay centered and your workflows stay efficient—part after part, job after job.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879393870,"sku":"3804-250","price":2282.18,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3804_c758d72c-54d6-40d8-9e66-b2e37dfe380f.png?v=1694801138"},{"product_id":"3804-315","title":"Bison Cast Iron Scroll Chuck -  6 Jaw - 1 Piece Jaw (Rear Mount) - 315mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3804 series rear-mount, 6-jaw cast iron scroll chuck is built for dependable, uniform workholding on round and symmetrical parts. Ideal for machine shops, fabrication settings, and hobbyists who need repeatable clamping with minimal deflection, it delivers steady performance across a range of projects.\n\u003cbr\u003e\u003cbr\u003e\nGround working surfaces help maintain true alignment and reduce workpiece marring during clamping. Supplied with a wrench and two jaw sets—one reversible hard jaw set and one outside hard jaw set—so you’re ready to tackle diverse parts from the start. All chucks are 100% manufactured in the Bison Bial factory in Poland, a mark of durable quality and long tool life.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eRear-mount design for rigidity and accuracy\u003c\/b\u003e: This mounting style provides solid support and minimizes deflection, delivering a stable, concentric grip on larger or precision parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTwo jaw sets included for versatile, durable clamping\u003c\/b\u003e: Comes with a reversible hard jaw set and an outside hard jaw set plus a wrench, enabling fast setup and extended jaw life for a variety of part geometries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGround working surfaces for consistent runout\u003c\/b\u003e: Ground contact surfaces enhance alignment accuracy and reduce surface damage, improving repeatability across multiple parts.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nDesigned for dependable performance, this 315 mm six-jaw chuck delivers repeatable gripping and durable construction for demanding turning applications. The cast iron body provides good vibration damping, while the Polish-made manufacturing ensures consistent quality and long tool life you can rely on project after project.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879426638,"sku":"3804-315","price":3102.62,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3804_78bce001-228c-46b9-b8d2-06981eedd3f9.png?v=1694801142"},{"product_id":"3804-400","title":"Bison Cast Iron Scroll Chuck -  6 Jaw - 1 Piece Jaw (Rear Mount) - 400mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3804 series rear‑mount, 6‑jaw cast iron scroll chuck delivers secure, repeatable gripping for precision turning on a wide range of workpieces. With a 400mm clamping diameter, it provides stable, multi‑jaw support while the rear mount design helps maintain rigidity and running accuracy on your lathe. Made entirely in the Bison Bial factory in Poland, this chuck features ground working surfaces to minimize damage and deflection and to deliver uniform grip across parts.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eGround working surfaces for consistent grip\u003c\/b\u003e: Ground surfaces reduce unintended marring and distribute clamping pressure evenly, protecting parts and improving repeatability during multiple setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSix‑jaw scroll design for true, concentric gripping\u003c\/b\u003e: The six jaws ensure superior concentricity and secure hold on both standard and irregular shapes, reducing runout and improving finish quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComplete with wrench and jaw sets\u003c\/b\u003e: Includes a wrench and 1 set of reversable hard jaws plus 1 set of outside hard jaws for fast, versatile gripping across a range of workpieces.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis combination provides reliable, precise clamping that streamlines setup, enhances holding power, and supports consistent, high‑quality results across prototyping, repair, and production runs. Built for durability and long service life, the Bison 3804 rear‑mount chuck is a dependable choice for demanding machining tasks.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879459406,"sku":"3804-400","price":5890.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3804_f4640e18-d4c4-45fd-8838-a2c70645d9ce.png?v=1694801146"},{"product_id":"3864-125","title":"Bison Steel Scroll Chuck - 6 Jaw - 1 Piece Jaw (Front Mount) - 125mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3864 series rear-mount 6-jaw steel scroll chuck, 125mm, features precision-ground working surfaces designed to minimize workpiece damage and deflection while delivering a uniformly distributed grip on cylindrical parts.\n\u003c\/p\u003e \u003cp\u003e\nDesigned for a wide range of users—from engineers and machinists to hobbyists—this chuck ships with a wrench and a jaw kit that includes reversible hard jaws and outside hard jaws, enabling fast setup and versatile clamping for various materials. All Bison scroll chucks are 100% made in the Bison Bial factory in Poland and are renowned for offering exceptional quality and tool life.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eUniform 6-jaw clamping for concentric grip\u003c\/b\u003e: The six jaws bite evenly around the workpiece, delivering true runout control and stable holding across a range of diameters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGround working surfaces for durability and precision\u003c\/b\u003e: Precision-ground surfaces reduce damage to the part and deflection, promoting repeatable accuracy over many cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIncludes wrench and complete jaw kit for fast setup\u003c\/b\u003e: Ready to use out of the box with reversible and outside hard jaws, so you can switch clamping styles quickly for different materials and operations, minimizing downtime.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nBy choosing this Bison scroll chuck, you gain dependable, repeatable gripping that keeps parts true through multiple operations, speeds up setup with the included jaw kit, and delivers smooth, consistent results across projects—from precision turning to routine machining. Built for durability and long tool life, it’s a reliable addition to any shop aiming to improve throughput and finish quality.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879492174,"sku":"3864-125","price":1521.1,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3864_26da273d-2bec-45a2-9a75-6c8cba0f6a0f.png?v=1694801150"},{"product_id":"3864-160","title":"Bison Steel Scroll Chuck - 6 Jaw - 1 Piece Jaw (Front Mount) - 160mm","description":"\u003cdiv\u003e\n\u003cp\u003eThe Bison 3864 series rear-mount, 6 jaw Steel scroll chuck is built for demanding turning work. With a 160 mm diameter and ground working surfaces, it helps prevent damage and deflection while delivering a uniform grip around the workpiece.\u003c\/p\u003e \u003cp\u003eSupplied with a wrench and jaw sets: one set of reversible hard jaws and one set of outside hard jaws, this chuck is ready to use out of the box. All Bison scroll chucks are 100% made in the Bison Bial factory in Poland and are renowned for offering exceptional quality and tool life.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e6‑jaw, steel scroll design\u003c\/b\u003e: Delivers a consistent, even clamp around the entire circumference for reliable gripping and repeatable results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGround working surfaces\u003c\/b\u003e: Reduce the risk of damage and deflection during heavy cuts while maintaining precise alignment of the workpiece.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReady-to-use with included accessories\u003c\/b\u003e: Comes with a wrench and both reversible and outside hard jaw sets for versatile, immediate setup.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThis chuck provides dependable performance across a range of cylindrical turning applications, helping you finish parts with confidence, streamline setup, and extend tool life in production runs or dedicated workshops.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879721550,"sku":"3864-160","price":1648.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3864_88a8960b-3343-4fca-8b68-57c8aaf58996.png?v=1694801154"},{"product_id":"3864-200","title":"Bison Steel Scroll Chuck - 6 Jaw - 1 Piece Jaw (Front Mount) - 200mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3864 series rear-mount, 6-jaw steel scroll chuck is built for precision and durability in a wide range of turning, grinding, and finishing tasks. Its six-jaw design provides balanced, true running grip that helps you hold round and irregular workpieces with confidence, making it a reliable choice for both professional shops and serious hobbyists.\n\u003c\/p\u003e\n\u003cp\u003e\nWith a 200mm diameter and precision-ground working surfaces, this chuck minimizes damage and deflection while delivering uniform, secure clamping across the entire workpiece. It ships with a wrench and jaw sets (one set of reversible hard jaws and one set of outside hard jaws), so you’re ready to clamp a variety of shapes right out of the box. All Bison scroll chucks are 100% manufactured in the Bison Bial factory in Poland, renowned for exceptional quality and long tool life.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePrecision-ground working surfaces\u003c\/b\u003e: Ground surfaces protect the workpiece and reduce deflection, delivering consistent grip and improved concentricity during each operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVersatile 6-jaw gripping with interchangeable jaws\u003c\/b\u003e: Includes reversible hard jaws and outside hard jaws, enabling secure, repeatable clamping for a wide range of shapes and sizes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReady-to-use with proven reliability\u003c\/b\u003e: Comes with a wrench and jaw sets, all made in Poland at the Bison Bial factory for durability and long service life in demanding environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis chuck helps streamline your workflow by providing dependable holding power, quick jaw adaptability, and enduring performance. The robust construction, combined with ground surfaces and the included accessories, supports higher quality finishes, less part distortion, and reduced downtime across repetitive cycles—giving you consistent results, time after time.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879754318,"sku":"3864-200","price":2028.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3864_a83d8f8e-2bf0-42f1-b957-b9344a1ceb3e.png?v=1694801158"},{"product_id":"3864-250","title":"Bison Steel Scroll Chuck - 6 Jaw - 1 Piece Jaw (Front Mount) - 250mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3864 series 6‑Jaw Steel Scroll Chuck is a robust, precision workholding solution for lathe operators who demand consistent grip and long service life. With a 250mm capacity and ground working surfaces, it provides even clamping to minimize damage and deflection while delivering reliable performance. Manufactured in the Bison Bial factory in Poland, these chucks are recognized for high quality and extended tool life.\n\u003c\/p\u003e \u003cp\u003e\nDesigned for a wide range of users—from engineers and machinists to hobbyists—the 6‑jaw configuration ensures a secure, uniform grip on round or irregular workpieces. This helps improve concentricity, reduces runout, and supports smoother turning and finishing tasks.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e6‑jaw, uniform grip\u003c\/b\u003e: Six jaws hold workpieces evenly for true concentricity and balanced turning, reducing wobble and improving finish quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGround working surfaces\u003c\/b\u003e: Precision‑ground surfaces resist wear and maintain accurate jaw alignment, boosting durability and long‑term accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReady‑to‑use kit\u003c\/b\u003e: Includes a wrench and 1 piece jaws with 1 set of reversible hard jaws and 1 set of outside hard jaws, enabling fast setup and versatile clamping for different parts.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis chuck helps streamline workflows by delivering repeatable gripping performance, minimizing setup time, and delivering consistent results across multiple jobs. Built for reliability and longevity, it’s a dependable choice for any workshop seeking durable, high‑quality tool holding.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879787086,"sku":"3864-250","price":2251.44,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3864_733998e3-4893-434f-8110-da005d5f569a.png?v=1694801162"},{"product_id":"3864-315","title":"Bison Steel Scroll Chuck - 6 Jaw - 1 Piece Jaw (Front Mount) - 315mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 3864 series front-mount 6-jaw steel scroll chuck is built for precision turning, delivering secure, repeatable workholding for a wide range of cylindrical parts. Sized at 315 mm, it provides consistent gripping force across the entire workpiece, helping you maintain concentricity and finish quality from first cut to final pass.\n\u003c\/p\u003e \u003cp\u003e\nGround working surfaces enhance grip and reduce the risk of damage or deflection during heavy cuts, keeping your part true and your setup reliable. This chuck is supplied with a wrench and a jaw kit that includes reversible hard jaws and outside hard jaws, ready to adapt to different workpieces without downtime. All Bison scroll chucks are 100% made in the Bison Bial factory in Poland, renowned for exceptional quality and long tool life.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eGround-true working surfaces\u003c\/b\u003e: Provides a stable, uniform grip that minimizes part deflection and protects both tool and workpiece for consistent machining results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVersatile jaw set included\u003c\/b\u003e: Comes with reversible hard jaws and outside hard jaws plus a wrench, enabling quick setup and easy switching between gripping styles to match different parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in Poland with proven reliability\u003c\/b\u003e: Built at the Bison Bial factory, delivering durable performance, tight tolerances, and dependable tool life for demanding shop environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis 315 mm, 6-jaw scroll chuck helps you streamline workflows, reduce setup time, and achieve repeatable, high-quality results across a variety of turning tasks. Its robust construction and included jaw options make it a dependable choice for engineers, machinists, and hobbyists seeking consistent clamping performance with minimal maintenance.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879819854,"sku":"3864-315","price":3392.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3864_f6f6f6b2-a87d-40e4-9196-3631dd9d7395.png?v=1694801166"},{"product_id":"3864-400","title":"Bison Steel Scroll Chuck - 6 Jaw - 1 Piece Jaw (Front Mount) - 400mm","description":"\u003cdiv\u003e\n\u003cp\u003eThe Bison 3864 series rear-mount, 6 jaw steel scroll chuck is built for demanding turning tasks on large-diameter workpieces. This 400mm chuck delivers secure, uniform gripping with long tool life, making it a dependable choice for engineers, machinists, and shop floors that require consistent results.\u003c\/p\u003e \u003cp\u003eWith ground working surfaces, it helps prevent damage and deflection while delivering a uniform bite across the workpiece. Supplied with a wrench and 1 piece jaws: 1 set of reversable hard jaws and 1 set of outside hard jaws. All Bison scroll chucks are 100% made in the Bison Bial factory in Poland and are renowned for offering exceptional quality and tool life.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eSix-jaw, positive gripping\u003c\/b\u003e: Provides true-running hold with even distribution of pressure, reducing runout and ensuring consistent clamping for large-diameter parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGround working surfaces\u003c\/b\u003e: Protects components from damage and deflection while promoting uniform grip and longer jaw life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReady-to-use with included jaw set\u003c\/b\u003e: Comes with a wrench and a complete jaw kit (reversable hard jaws and outside hard jaws) for immediate setup and versatile handling of different part shapes.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThis chuck helps you hold large parts securely, reduce setup time, and achieve repeatable, high-quality results in every turning operation. The 3864 rear-mount design combines robust construction with precise jaw alignment, delivering consistent performance under demanding workloads and a long service life thanks to Polish manufacturing standards.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282879852622,"sku":"3864-400","price":6777.64,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/3864_ce610276-1c84-4c2b-96b6-6b81de74d218.png?v=1694801169"}],"url":"https:\/\/www.protool-ltd.co.uk\/collections\/bison-4-6-jaw-scroll-chucks.oembed","provider":"Protool Precision Tools","version":"1.0","type":"link"}